Specifications - State of Delaware

SECTION 079200 - JOINT SEALANTS: continued
2.06 PREFORMED JOINT SEALANTS:
A. Preformed Silicone Joint Sealants: Manufacturer's standard sealant consisting of precured lowmodulus
silicone extrusion, in sizes to fit joint widths indicated, combined with a neutralcuring
silicone sealant for bonding extrusions to substrates.
1. Products: Subject to compliance with requirements, provide one of the following or
approved equal:
a. Dow Corning Corporation; 123 Silicone Seal.
b. GE Advanced Materials - Silicones; UltraSpan US1100.
c. May National Associates, Inc.; Bondaflex Silbridge 300.
d. Pecora Corporation; Sil-Span.
e. Sealex, Inc.; ImmerSeal.
B. Preformed Foam Joint Sealant: Manufacturer's standard preformed, precompressed, open-cell
foam sealant manufactured from urethane foam with minimum density of 10 lb./cu. ft. and
impregnated with a nondrying, water-repellent agent. Factory produce in precompressed sizes
in roll or stick form to fit joint widths indicated; coated on one side with a pressure-sensitive
adhesive and covered with protective wrapping.
1. Products: Subject to compliance with requirements, provide one of the following or
approved equal:
a. Dayton Superior Specialty Chemicals; Polytite Standard.
b. EMSEAL Joint Systems, Ltd.; Emseal 25V.
c. Sandell Manufacturing Co., Inc.; Polyseal.
d. Schul International, Inc.; Sealtite.
e. Willseal USA, LLC; Willseal 150.
2.07 JOINT SEALANT BACKING:
A. General: Provide sealant backings of material that are nonstaining; are compatible with joint
substrates, sealants, primers, and other joint fillers; and are approved for applications indicated
by sealant manufacturer based on field experience and laboratory testing.
B. Cylindrical Sealant Backings: ASTM C1330, Type C (closed-cell material with a surface
skin), and of size and density to control sealant depth and otherwise contribute to producing
optimum sealant performance.
C. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant
manufacturer for preventing sealant from adhering to rigid, inflexible joint-filler materials or
joint surfaces at back of joint. Provide self-adhesive tape where applicable.
2.08 MISCELLANEOUS MATERIALS:
A. Primer: Material recommended by joint-sealant manufacturer where required for adhesion of
sealant to joint substrates indicated, as determined from preconstruction joint-sealant-substrate
tests and field tests.
B. Cleaners for Nonporous Surfaces: Chemical cleaners acceptable to manufacturers of sealants
and sealant backing materials, free of oily residues or other substances capable of staining or
harming joint substrates and adjacent nonporous surfaces in any way, and formulated to
promote optimum adhesion of sealants to joint substrates.
C. Masking Tape: Nonstaining, nonabsorbent material compatible with joint sealants and
surfaces adjacent to joints.
DEAN079200.DOC 079200-7